Sharpening appliance.



C. I". CRAMER.

SHARPENING APPLIANCE.

APPLICATION min AHLB. ma.

1,24,513. Patented Aug. 6,1918.

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CHARLES E. CBAMEB, or INnrA A, PENNSYLVANIA.

SHARPENING APPLIANCE.

Specification of Letters Patent.

Patented Aw. 6, 1918.

Application filed April 8, 1918. Serial No. 227,322.

To all whom it may concern:

Be it known that I, CnnnLns F. ORAMER, a citizen of the United States, residing at Indiana, in the county of Indiana and State of Pennsylvania, have invented certain new and useful Improvements in Sharpening Appliances, of which the following is a specification.

This invention relates to sharpening knives and like purposes, and the generalobject is to provide a device of this character using a sheet of abrading material, the device being formed to provide a support for the abrading material, and rollers upon which the abrading material may he wound, so that by rotating one of the rollers the abrading material may be shifted to bring a new surface into position for use.

A further object is to provide a construction of this characterembodying an elongated supporting member, rollers supported below the supporting member and upon which the abrading material is wound, the rollers being provided with means whereby they may be'restrained or held from accidental rotation which would tend to slacken the sheet.

A f rther obj ct i t o moun he rollers as to. keep the abrasive fabric taut and free from wrinkles, due to unequal buckling of the abr c.-

A furthe obje t i to P vide p e means for attaching the abradi ng fabric to the rollers so that the abrading fabric may b readi y relne ed f 'oe the o le s re placed the e n- Other objects will appear inthe course of the following description.

My invention is illustrated in the accom- Pe yine d a ing 1 he e Figure 1 is a perspective view of my impro e s a pe ing d ic .Fig. 2 is a vertical longitudinal section of th handle and o tli lm re e dev ce; and

Fig. 3 1s a section on the line 3-3 of g.- 2

Referr ing to these drawings, it will be seen that my sharpening device comprises a fabric supporting body 10, which may be made of wood, composition, or any other snitable lnaterial, and which has a rounded upper face and rounded corners. This body 10 is supported at one end by a plate 11, which is preferably of metal, though t may e i es e ei'feth r met riatthis pla e @9 devices for,

stituting a support, while at the opposite end of the body 10 there is attached the plate 12, which is also preferably made of metal and constitutes a support. The plates 11 and 12 may be held to the body 10 by means of screws or in any other suitable manner. Preferably the plate 12 upon its inside face, below the body 10, is cut away, as at 13, and attached to the plate 12, or preferably formed as an integral part of the body 10, is a handle 11.

The plate 11 is formed with the perforations 15. while the plate 12 is formed with upwardly divergent, elongated perforations or slots 16. Disposed through these slots 16, and rotatably disposed in the perforations 15, are the winding shafts 17, which terminate with knobs at their ends below the handle i land mounted upon each shaft 17 is a sleeve 19, which may be made of metal, wood, composition, or of any other suitable material, but which is preferably of thin metal this sleeve being screwthreaded, as at 1 Coacting with the sleeve is a collar 20, which is intcriorly screw-tln'eaded to en gage the screw-threads 1%) and which constitutes a nut. This collar is preferably formed with a band 21, which band may he knurled or may be made of rubber or other material with which the linger can readily engage.

Passing through each shaft 17 is a pin which bears against the inside face of the member 12 when the corresponding collar 20 is turned up,so that the wall of the opening 16 is clamped between the collar -20 and the pin 22, when it is desired to hold the roller or shaft from rotation. It will be understood, of course, that the sleeve 1?) is to be pinned or otherwise attached to the corresponding shaft or roller, so as to rotate therewith. By rotating the collar 20 reversely, it is released from its engagement with the wall of the perforation 1(3 and this permits the roller to be rotated freely and by removing the pin 22, it is obvious that the roller or shaft may be entirely removed.

While I do not wish to be limited to any particular means for holding the abrading sheet or fabric upon the rollers 17, I have shown each of these shafts as being formed with the longitudinally extending grooves 23, connected by transverse bores 2el, a lace 25 being threaded through these grooyes 23 and bores 24, this lace being passed through suitable openings in the margin of the sheet 18 and holding the ends of the sheet in firm 7 engagement with the roller or shaft. By this means the sheet 18 may be held at its ends attached to the shafts 17 along its en-, tire extent and it is obvious thatthe sheet may be readily disengaged and a new sheet engaged with the shafts whenever it is necessary to replace the Worn out abrading sheet with a new one.

The use of my invention will be obvious from what has gone before. Ordinarily that portion of the sheet which is extended over the sides and curved upper face of the supporting member 10 will constitute the abrading surface, and the knives, scissors, or other article desired to be sharpened will be drawn across this abrading sheet. lVhen the sheet has become so worn as to be of no further value, the collars 20 are released and the rollers or shafts 17 rotated in a direction to wind up the used portion of the sheet on one of the shafts and bring a fresh portion A of the sheet over the upper surface of the v effective in use and which may be cheaply abrading fabric over the form 10. It will be noted that the member 12 constitutes a hilt guard, Which will prevent knives being sharpened from cutting/the hand, thus permitting he device to be used without extreme care being taken. a

WVhile I haVe-illustrated a form of my'invention which I regard as particularly made,'yet it will be understood'that many modifications may be made in the details of construction and arrangement of the parts without departing from the spirit of the invention, as defined in the appended claims.

Having described my invention,-what I claim is: V

1. A'sharpening device of the character described comprising an elongated body having a rounded upper face and rounded corners, supporting members disposed at opposite ends of the body and extending below it, a handle extending from one end of the body, rollers rotatably mounted in the supporting members and disposed beneath the body and extending through the supporting members, a sheet of abrasive 1naterial'ex tending over the top of the body and wound upon said rollers, and means on the. rollers disposed beneath the handlefor holding them against accidental rotation'constituting means whereby the rollers may be rotated.

2. A sharpening device of-the character described comprising an elongated body hav ing a rounded upper face and rounded corners, supporting members disposed at op posite ends of the body and extending below it, rollers rotatably mounted in the support- 7 7 ing members and extending below the body, a sheet of abrasive'materlal extendmg over the body and wound upon said rollers, and means on the rollers for holdlng them against accidental rotation, said means 1ncluding a nut having screw-threaded operative engagement with a roller and adapted to be turned to bear against the ad]acent supporting member.

3. A sharpening device of the character described comprising an elongated body having a rounded upper-face and rounded corners, sugpporting members. disposed at opposite ends of the body and extending below it, rollersrotatably mounted in the. supporting members and extending below the body, a sheet of abrasive material extending over the body and wound upon said rollers, and means on the rollers for holding them against accidental rotation, said means comprisinga pin extending through each roller and bearing against the inside face of the corresponding supporting member, and anut having screw-threaded engagement with the roller andada'ptedto bear against the outer face of the support.

4. A sharpening device of the character described comprising an elongated body having a rounded upper faceand rounded corners, supporting members disposed at opposite ends of the body and'extending below it, rollers rotatably mounted in the supporting members and extending below the body, a sheet of abrasivematerial extending over the body and Wound upon said rollers, and means on the rollers for holding them against, accidental rotation,said means com-' prising a pin detachably disposed through each roller and normally bearing againstthe inside face of the adjacent supporting member, an exteriorly screw-threaded sleeve mounted upon the roller, and a nut having describedcomprising an elongatedsupport- 7 ing body having supporting members at opposite ends and having a handle and extending beyond one of said supportingmembers, said last named supporting 'member having upwardly diverging slots, rollers ex tending through the slots of the last named supporting memberga sheet of abradingmaterial Wound upon the rollers and extending over the body, and means on the rollers for holding them fromaccidentail rotation.)

6. A sharpening device of the character described comprising an elongated :supporting body having, supporting members at opposlte ends and having a vhandle and ex tending beyond one of said supporting memor bers, said last named supporting member having upwardly divergent slots,--rollers ex tending through the slots'of the last named supporting member, a sheet of abrading material wound upon the rollers extending over the body, and means on the rollers for holding them from accidental rotation, and consisting of a member disposed on each roller and bearing against the inside faces of the supporting member, and a nut having operative engagement with the roller and bearing against the outside face of said supporting member.

7. A sharpening device of the character described comprising an elongated supporting body having a rounded upper face and corners, one end of the supporting member being formed with an integral handle, a plate attached to the opposite end of the supporting member and extending downward below it, a plate attached to the handle end of the supporting member and extending below it and through which said handle passes, rollers mounted in said plates and disposed below the supporting member, an abrading sheet attached to said rollers, and means for holding said rollers against accidental rotation.

8. A sharpening device of the character described comprising a body, supporting members attached to the ends of the body, an abrading sheet extending over the body and rollers rotatably mounted in the supporting members, each of said rollers being longitudinally grooved and transversely bored at a plurality of points, and laces threaded through the abrasive sheet and through said bores.

In testimony whereof I aflix my signature in the presence of two witnesses.

CHARLES F. CRAMER.

Witnesses:

THOMAS H. CARSON, HAUYLE FEE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. 0." 

